Can someone help me with my logic for a bill program?

I am trying to calculate a cable bill for a residential and business customer can someone point me in the right direction for my logic?For residential customers it is 4.50 processing fee,30 basic service fee and 5 per channel. For business customers processing fee = 16.50 basicservice fee is 80 for the first 10 connections if connections greater than 10 then its 4 for each additional and 50 per channel when I hit calculate no matter how many connections or channels I choose for each category it gives me the same output which means my logic must be wrong can anyone make a suggestion?

I have a 2d matrix with dimension (3, n) called A, I want to calculate the normalization and cross product of two arrays (b,z) (see the code please) for each column (for the first column, then the second one and so on).
the function that I created to find the ...

Write a C program that should create a 10 element array of random integers (0 to 9). The program should total all of the numbers in the odd positions of the array and compare them with the total of the numbers in the even positions of the array and indicate ...